US3316031A - Hydraulic braking system distributor with damping means - Google Patents

Hydraulic braking system distributor with damping means Download PDF

Info

Publication number
US3316031A
US3316031A US472834A US47283465A US3316031A US 3316031 A US3316031 A US 3316031A US 472834 A US472834 A US 472834A US 47283465 A US47283465 A US 47283465A US 3316031 A US3316031 A US 3316031A
Authority
US
United States
Prior art keywords
slide valve
distributor
chamber
bore
orifice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US472834A
Inventor
Henry-Biabaud Edmond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Citroen SA
Original Assignee
Andre Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andre Citroen SA filed Critical Andre Citroen SA
Application granted granted Critical
Publication of US3316031A publication Critical patent/US3316031A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4004—Repositioning the piston(s) of the brake control means by means of a fluid pressurising means in order to reduce the brake pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/141—Systems with distributor valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/44—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems

Definitions

  • a hydraulic braking system of vehicle is already known wherein, between a source of fluid under pressure (reservoir, pump and accumulator if necessary) and each brake cylinder transmitting the braking force to the brake shoes, a pressure metering distributor is provided of which the slide valve is actuated by means of the brake pedal.
  • the slide valve is rigid with a piston adapted to damp out any vibrations likely to occur during the brake application.
  • This arrangement makes it necessary for the driver to exert an effort during a relatively long stroke (of the order of A3) for overcoming the loss of pressure caused by the damping piston during the stroke of said slide valve from its inoperative position to its operative or inlet position.
  • the effort to be exerted by the driver on the brake pedal is proportional to the rapidity with which it is desired to produce the braking action. In thecase of a fierce brake application, this effort is not a nuisance, but when it is desired to produce rapidly a light brake applications, it is far from negligible and removes fineness from the desired brake application.
  • the distributor according to this invention to be incorporated in the braking system of an automotive vehicle, which is disposed between a source of liquid under pressure and at least one brake cylinder, comprising a slide valve actuated by means of a brake pedal and a piston slidably mounted in a chamber of the distributor body and constituting therewith a device capable of damping out the slide valve vibration, is characterized in that said vibration damping piston is mounted separately from said slide valve in said chamber and urged by a spring against the bottom of said chamber and the orifice of the bore in which said slide valve is mounted, this slide valve engaging and moving said damping piston only at the end of the stroke providing the braking position.
  • the hydraulic braking system illustrated comprises a unit adapted to deliver fluid under pressure, this unit comprising a reservoir 1, a pump 2 and a fluid accumulator 3.
  • This unit is connected through a pressure pipe line 4 and a return pipe line 5 leading to the reservoir, respectively to an inlet port 6 and an exhaust port 7 formed in the body 8 of the distributor.
  • a relatively thick sleeve 9 is force fitted and has radial ducts 11 and 12 formed therein which are in axial alignment, and communicate with, the aforesaid ports 6 and 7 respectively.
  • the sleeve 9 has also formed therein an axial bore 13 in which a valve member 14 is slidably mounted.
  • This slide valve 14 has formed in its intermediate portion a relatively wide groove 10 which, in the inoperative position shown in the drawing, provides a fluid connection between the exhaust duct 12 and another radial duct 15 formed in said sleeve 9, the duct 15 registering with another port 16 formed in the distributor body which is connected through another pipe line 17 to the brake cylinder 18.
  • the slide valve 14 of the distributor is constantly urged to its inoperative position by a compression spring 18 engaging the top or outer face of sleeve 9.
  • the axial movement of the slide valve 14 is caused by a force X exerted by means of a lever 21 actuated by the brake pedal (not shown), this lever 21 being for example a compensator lever of a braking-elfort apportioning device.
  • the bore 13 in which the valve member 14 is slidably mounted opens into a chamber 22 of greater diameter which is formed in the sleeve 9.
  • This chamber is closed at its outer end by a screw plug 23 engaging a tapped bore of the distributor body 8.
  • This chamber 22 is also connected through a longitudinal duct 24 to the axial duct 15 leading through the port 16 to the brake cylinder pipe line 17.
  • a vibration damping piston 25 urged in the inoperative position against the bottom of chamber 22 and the orifice of the axial bore 13 by a compressing spring 26 reacting against the aforesaid screw plug 23.
  • the width L of groove 10 formed in slide valve 14 is very slightly less than the distance L between the adjacent generatrices respectively of ducts 11 and 12 (about 0.012").
  • the length H of slide valve 14 which is measured betwen the upper end of its groove 10 and the lower end of the slide valve is equal or very slightly greater than the distance H measured from the lower generatrix of duct 12 and the bottom of chamber 22.
  • the orifice of the exhaust duct 12 is wide open in the inoperative position of slide valve 14, whereby the brake shoes will be rapidly released when the driver releases the brake pedal; on the other hand, the slide valve 14 may be brought rapidly and effortlessly in the braking position during the greater part of its stroke.
  • Distributor as set forth in claim 1, comprising an inlet duct and an exhaust duct formed in said body whereby said inlet duct be nearer to said bore orifice than said exhaust duct, said ducts opening respectively through inlet and exhaust orifices into said slide valve receiving body, an annular groove formed in the periphery of said slide valve, the width or longitudinal dimension of said groove being slightly less than the distance measured between the nearest points of said inlet and exhaust orifices, the distance measured between the end of the slide valve which engages said damping piston through said bore orifice and the limit of said groove which is remotest from said end of said slide valve being equal or very slightly greater than the distance measured between the plane of said bore orifice and the nearest point of said exhaust orifice.

Description

A ril 5, W7 E. HEiNRY-BIABAUD 3,31 31 HYDRAULIC BRAKING SYSTEM DISTRIBUTOR WITH DAMPING MEANS Filed July 19, 1965 United States Patent 3,316,031 HYDRAULIC BRAKING SYSTEM DISTRIBUTOR WITH DAMPING MEANS Edmond Henry-Biabaud, Paris, France, assignor to Societe Anonyme Andre Citroen, Paris, France Filed July 19, 1965, Ser. No. 472,834 Claims priority, application France, July 22, 1964, 982,601, Patent 1,409,866 3 Claims. (Cl. 303-50) This invention relates to a distributor of a hydraulic braking system of a vehicle.
A hydraulic braking system of vehicle is already known wherein, between a source of fluid under pressure (reservoir, pump and accumulator if necessary) and each brake cylinder transmitting the braking force to the brake shoes, a pressure metering distributor is provided of which the slide valve is actuated by means of the brake pedal.
In this known type of distributor the slide valve is rigid with a piston adapted to damp out any vibrations likely to occur during the brake application.
In the inoperative position of said distributor it is advantageous to keep the distributor orifice connected to the return pipe line leading to the fluid reservoir in a wide open condition to permit a rapid release of the brake shoes, thus reducing to a minimum the risk of leakage in the pressure feed line.
This arrangement makes it necessary for the driver to exert an effort during a relatively long stroke (of the order of A3) for overcoming the loss of pressure caused by the damping piston during the stroke of said slide valve from its inoperative position to its operative or inlet position.
The effort to be exerted by the driver on the brake pedal is proportional to the rapidity with which it is desired to produce the braking action. In thecase of a fierce brake application, this effort is not a nuisance, but when it is desired to produce rapidly a light brake applications, it is far from negligible and removes fineness from the desired brake application.
It is the object of the present invention to avoid this inconvenience.
To this end, the distributor according to this invention to be incorporated in the braking system of an automotive vehicle, which is disposed between a source of liquid under pressure and at least one brake cylinder, comprising a slide valve actuated by means of a brake pedal and a piston slidably mounted in a chamber of the distributor body and constituting therewith a device capable of damping out the slide valve vibration, is characterized in that said vibration damping piston is mounted separately from said slide valve in said chamber and urged by a spring against the bottom of said chamber and the orifice of the bore in which said slide valve is mounted, this slide valve engaging and moving said damping piston only at the end of the stroke providing the braking position.
Due to the fact that the damping piston is not rigidly connected to the distributor slide valve during the greater part of the stroke leading to the braking position, this stroke can take place rapidly and effortlessly as long as the slide valve is not abutting against the damping piston. On the other hand, since the major portion of the stroke leading to the braking position takes place efi'ortlessly, it is possible .in the inoperative position of the slide valve to fully open the exhaust port of the distributor body which is connected to the fluid reservoir.
A typical form of embodiment of the present invention will now be described by way of example with reference to the single figure of the attached drawing showing in longitudinal axial section a distributor constructed according to the teachings of this invention and incorporated in a hydraulic braking system of a vehicle.
Although a single brake and brake cylinder are shown in this figure, it will be readily understood by those conversant with the art that the distributor according to this invention may be used for feeding a plurality of brake cylinders.
In the drawing, the hydraulic braking system illustrated comprises a unit adapted to deliver fluid under pressure, this unit comprising a reservoir 1, a pump 2 and a fluid accumulator 3. This unit is connected through a pressure pipe line 4 and a return pipe line 5 leading to the reservoir, respectively to an inlet port 6 and an exhaust port 7 formed in the body 8 of the distributor. In a central bore 8 formed in the same body a relatively thick sleeve 9 is force fitted and has radial ducts 11 and 12 formed therein which are in axial alignment, and communicate with, the aforesaid ports 6 and 7 respectively. The sleeve 9 has also formed therein an axial bore 13 in which a valve member 14 is slidably mounted. This slide valve 14 has formed in its intermediate portion a relatively wide groove 10 which, in the inoperative position shown in the drawing, provides a fluid connection between the exhaust duct 12 and another radial duct 15 formed in said sleeve 9, the duct 15 registering with another port 16 formed in the distributor body which is connected through another pipe line 17 to the brake cylinder 18.
The slide valve 14 of the distributor is constantly urged to its inoperative position by a compression spring 18 engaging the top or outer face of sleeve 9. The axial movement of the slide valve 14 is caused by a force X exerted by means of a lever 21 actuated by the brake pedal (not shown), this lever 21 being for example a compensator lever of a braking-elfort apportioning device.
The bore 13 in which the valve member 14 is slidably mounted opens into a chamber 22 of greater diameter which is formed in the sleeve 9. This chamber is closed at its outer end by a screw plug 23 engaging a tapped bore of the distributor body 8. This chamber 22 is also connected through a longitudinal duct 24 to the axial duct 15 leading through the port 16 to the brake cylinder pipe line 17.
Enclosed in this chamber 22 with a certain radial clearance is a vibration damping piston 25 urged in the inoperative position against the bottom of chamber 22 and the orifice of the axial bore 13 by a compressing spring 26 reacting against the aforesaid screw plug 23.
From the drawing it will be seen that the greater part of the stroke necessary for moving the slide valve 14 to its braking position takes place without interfering with the damping piston 25. It is only during the last fraction of this stroke that the lower end of the slide valve engages the damping piston 25 and then moves the latter downwards. When the slide valve is in this braking position, in which its groove 10 connects the inlet duct 11 to the duct 15 leading to the brake cylinder 18, the vibrations of the slide valve 3 about its position of equilibrium which might be produced during the brake application are thus damped out by the piston 25 acting as a hydraulic damper in conjunction with the chamber 22.
The width L of groove 10 formed in slide valve 14 is very slightly less than the distance L between the adjacent generatrices respectively of ducts 11 and 12 (about 0.012"). On the other hand, the length H of slide valve 14 which is measured betwen the upper end of its groove 10 and the lower end of the slide valve is equal or very slightly greater than the distance H measured from the lower generatrix of duct 12 and the bottom of chamber 22. Under these conditions, and provided that a sufficient clearance is left between the bottom face of slide valve 14 and the upper face of piston 25, the orifice of the exhaust duct 12 is wide open in the inoperative position of slide valve 14, whereby the brake shoes will be rapidly released when the driver releases the brake pedal; on the other hand, the slide valve 14 may be brought rapidly and effortlessly in the braking position during the greater part of its stroke.
What I claim is:
1. Distributor of a hydraulic braking system of a vehicle which is responsive to a brake pedal, said distributor being disposed between a source of fluid under pressure and at least one brake cylinder and comprising a body, a bore formed in said body, a slide valve movable in said bore between an inoperative position and a braking position and responsive to said brake pedal, a chamber formed in said distributor body, said bore leading into said chamber through an orifice, the end of said slide valve, in the inoperative position of said slide valve, being spaced from said orifice, a vibration damping piston housed in said chamber and spaced from said slide valve, 'a spring disposed in said chamber and urging said piston against said orifice of said bore in which said slide valve is mounted, whereby said slide valve will engage and move said damping piston only during the last fraction of the slide valve stroke to its braking position.
2. Distributor as set forth in claim 1, comprising a return spring associated with said slide valve which engages said distributor body, externally of said body, and adapted constantly to urge said slide valve to its inoperative position.
3. Distributor as set forth in claim 1, comprising an inlet duct and an exhaust duct formed in said body whereby said inlet duct be nearer to said bore orifice than said exhaust duct, said ducts opening respectively through inlet and exhaust orifices into said slide valve receiving body, an annular groove formed in the periphery of said slide valve, the width or longitudinal dimension of said groove being slightly less than the distance measured between the nearest points of said inlet and exhaust orifices, the distance measured between the end of the slide valve which engages said damping piston through said bore orifice and the limit of said groove which is remotest from said end of said slide valve being equal or very slightly greater than the distance measured between the plane of said bore orifice and the nearest point of said exhaust orifice.
No references cited.
EUGENE G. BOTZ, Primary Examiner.

Claims (1)

1. DISTRIBUTOR OF A HYDRAULIC BRAKING SYSTEM OF A VEHICLE WHICH IS RESPONSIVE TO A BRAKE PEDAL, SAID DISTRIBUTOR BEING DISPOSED BETWEEN A SOURCE OF FLUID UNDER PRESSURE AND AT LEAST ONE BRAKE CYLINDER AND COMPRISING A BODY, A BORE FORMED IN SAID BODY, A SLIDE VALVE MOVABLE IN SAID BORE BETWEEN AN INOPERATIVE POSITION AND A BRAKING POSITION AND RESPONSIVE TO SAID BRAKE PEDAL, A CHAMBER FORMED IN SAID DISTRIBUTOR BODY, SAID BORE LEADING INTO SAID CHAMBER THROUGH AN ORIFICE, THE END OF SAID SLIDE VALVE, IN THE INOPERATIVE POSITION OF SAID SLIDE VALVE, BEING SPACED FROM SAID ORIFICE, A VIBRATION DAMPING PISTON HOUSED IN SAID CHAMBER AND SPACED FROM SAID SLIDE VALVE, A SPRING DISPOSED IN SAID CHAMBER AND URGING SAID PISTON AGAINST SAID ORIFICE OF SAID BORE IN WHICH SAID SLIDE VALVE IS MOUNTED, WHEREBY SAID SLIDE VALVE WILL ENGAGE AND MOVE SAID DAMPING PISTON ONLY DURING THE LAST FRACTION OF THE SLIDE VALVE STROKE TO ITS BRAKING POSITION.
US472834A 1964-07-22 1965-07-19 Hydraulic braking system distributor with damping means Expired - Lifetime US3316031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR982601A FR1409866A (en) 1964-07-22 1964-07-22 Distributor of a hydraulic braking device of a vehicle

Publications (1)

Publication Number Publication Date
US3316031A true US3316031A (en) 1967-04-25

Family

ID=8835104

Family Applications (1)

Application Number Title Priority Date Filing Date
US472834A Expired - Lifetime US3316031A (en) 1964-07-22 1965-07-19 Hydraulic braking system distributor with damping means

Country Status (9)

Country Link
US (1) US3316031A (en)
BE (1) BE666653A (en)
DE (1) DE1480072C3 (en)
ES (1) ES315624A1 (en)
FR (1) FR1409866A (en)
GB (1) GB1042120A (en)
LU (1) LU49006A1 (en)
NL (1) NL6509070A (en)
SE (1) SE315511B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698415A (en) * 1969-08-01 1972-10-17 Linde Ag Pressure-regulating valve
US4402478A (en) * 1980-03-11 1983-09-06 Societe Nationale Industrielle Aerospatiale Process and device for braking a wide-track aircraft taxiing on the ground
US4484726A (en) * 1982-08-02 1984-11-27 Dresser Industries, Inc. Pulsation limiter for manually actuated hydraulic valve
US4861115A (en) * 1985-01-16 1989-08-29 Wabco Westinghouse Fahrzeugbremsen Gmbh Electrically-controlled motor vehicle brake system
US5295512A (en) * 1992-02-24 1994-03-22 M. B. Adams And Associates, Inc. Fluid control spool valve
WO1995003493A1 (en) * 1992-02-24 1995-02-02 M.B. Adams And Associates, Inc. Fluid control spool valve
US8534639B1 (en) * 2012-04-18 2013-09-17 HUSCO Automotive Holdings, Inc. Solenoid valve with a digressively damped armature
US8573559B1 (en) * 2012-04-18 2013-11-05 Husco Automotive Holdings, LLC Control valve with area independent pressure sensing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354907A1 (en) * 1976-06-15 1978-01-13 Cam Gears Ltd Control valve for servo brakes - with stepped piston to enclose fluid volume for manual braking with servo failure
DE3213234A1 (en) * 1982-04-08 1983-10-13 Alfred Teves Gmbh, 6000 Frankfurt Hydraulic booster valve for brake systems
CA2204681A1 (en) * 1996-05-24 1997-11-24 Michael R. Williams Gate valve bonnet assembly with built-in speed reducer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698415A (en) * 1969-08-01 1972-10-17 Linde Ag Pressure-regulating valve
US4402478A (en) * 1980-03-11 1983-09-06 Societe Nationale Industrielle Aerospatiale Process and device for braking a wide-track aircraft taxiing on the ground
US4484726A (en) * 1982-08-02 1984-11-27 Dresser Industries, Inc. Pulsation limiter for manually actuated hydraulic valve
US4861115A (en) * 1985-01-16 1989-08-29 Wabco Westinghouse Fahrzeugbremsen Gmbh Electrically-controlled motor vehicle brake system
US5295512A (en) * 1992-02-24 1994-03-22 M. B. Adams And Associates, Inc. Fluid control spool valve
WO1995003493A1 (en) * 1992-02-24 1995-02-02 M.B. Adams And Associates, Inc. Fluid control spool valve
US8534639B1 (en) * 2012-04-18 2013-09-17 HUSCO Automotive Holdings, Inc. Solenoid valve with a digressively damped armature
US8573559B1 (en) * 2012-04-18 2013-11-05 Husco Automotive Holdings, LLC Control valve with area independent pressure sensing

Also Published As

Publication number Publication date
DE1480072C3 (en) 1974-08-22
DE1480072B2 (en) 1974-01-24
LU49006A1 (en) 1965-09-07
NL6509070A (en) 1966-01-24
FR1409866A (en) 1965-09-03
DE1480072A1 (en) 1969-10-09
GB1042120A (en) 1966-09-07
SE315511B (en) 1969-09-29
ES315624A1 (en) 1966-04-01
BE666653A (en) 1965-11-03

Similar Documents

Publication Publication Date Title
US3316031A (en) Hydraulic braking system distributor with damping means
US2260490A (en) Hydraulic brake booster
US4188073A (en) Anti-vibration apparatus for a vehicle brake system
US2532960A (en) Brake booster
US4316642A (en) Control device for hydraulic brake systems incorporating antiskid control apparatus
GB1245805A (en) Automatic banking apparatus for vehicles
GB1185074A (en) Improvements in or relating to Oscillation Dampers
US2828719A (en) Booster motor mechanism
US2376519A (en) Valve control for presses and the like
US4059174A (en) Braking correction device
US3852962A (en) Master cylinder partial system displacement modifier
US2961831A (en) Play take-up device for hydraulic control system
USRE27784E (en) Master cylindhi) kok hydraulic: xhak inc, sy.stkm
GB488032A (en) Improvements in hydraulic transmission systems
US2597598A (en) Brake system
US3616881A (en) Trailer tow bar dampers
US2873724A (en) Push-through type power brake mechanism
GB2067252A (en) Master cylinder
US2098653A (en) Hydraulic brake apparatus
JPS5852854B2 (en) Pressure control device for hydraulic brake booster
US2196190A (en) Hydraulic brake system
US1784547A (en) Hydraulic brake mechanism
US3410608A (en) Hydraulic braking system incorporating two hydraulic fluid circuits with a pressure limiter
US2865335A (en) Power multiplier
US2410169A (en) Fluid pressure producing device